Hair straightener



FIG. 1 is a perspective view of a hair straightener showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a rear, right, bottom perspective view thereof; and,

FIG. 9 is a perspective view showing the hair straightener in a closed state. 

CLAIM I claim the ornamental design for the hair straightener, as shown and described. 